oj.uz

Submission #402532

# Submission time Handle Problem Language Result Execution time Memory
402532 2021-05-11T22:47:55 Z rqi Furniture (JOI20_furniture) C++14
100 / 100
 438 ms 12228 KB 
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pi;

#define mp make_pair
#define f first
#define s second
#define pb push_back

#define sz(x) (int)(x).size()

const int mx = 1005;
int N, M;
bool C[mx][mx];
bool disap[mx][mx];
pi deg[mx][mx];//leftup, rightdown degree
queue<pi> to_remove;
int maxrow[mx];
int maxcol[mx];

void subDeg(int X, int Y, bool typ){
    if(C[X][Y] || disap[X][Y]) return;
    if(mp(X, Y) == mp(1, 1) || mp(X, Y) == mp(N, M)) return;
    if(typ == 0){
        deg[X][Y].f--;
    }
    else{
        deg[X][Y].s--;
    }
    if(deg[X][Y].f == 0 || deg[X][Y].s == 0){
        to_remove.push(mp(X, Y));
        disap[X][Y] = 1;
    }
}

void removeToRemoves(){
    while(sz(to_remove)){
        pi coor = to_remove.front();
        to_remove.pop();
        disap[coor.f][coor.s] = 0;
        C[coor.f][coor.s] = 1;
        subDeg(coor.f-1, coor.s, 1);
        subDeg(coor.f, coor.s-1, 1);
        subDeg(coor.f+1, coor.s, 0);
        subDeg(coor.f, coor.s+1, 0);
    }
}

void updateMaxes(int X, int Y){
    while(maxrow[X]+1 <= M){
        if(C[X][maxrow[X]+1]){
            maxrow[X]++;
            continue;
        }
        else{
            break;
        }
    }
    while(maxcol[Y]+1 <= N){
        if(C[maxcol[Y]+1][Y]){
            maxcol[Y]++;
            continue;
        }
        else{
            break;
        }
    }
}

int main(){
    cin.tie(0)->sync_with_stdio(0);
    cin >> N >> M;
    for(int i = 1; i <= N; i++){
        for(int j = 1; j <= M; j++){
            cin >> C[i][j];
        }
    }
    for(int i = 0; i <= N+1; i++){
        C[i][0] = C[i][M+1] = 1;
    }
    for(int i = 0; i <= M+1; i++){
        C[0][i] = C[N+1][i] = 1;
    }
    for(int i = 1; i <= N; i++){
        for(int j = 1; j <= M; j++){
            if(mp(i, j) == mp(1, 1) || mp(i, j) == mp(N, M)) continue;
            if(C[i][j]) continue;
            deg[i][j].f+=(int)(!C[i-1][j])+(int)(!C[i][j-1]);
            deg[i][j].s+=(int)(!C[i+1][j])+(int)(!C[i][j+1]);
            if(deg[i][j].f == 0 || deg[i][j].s == 0){
                to_remove.push(mp(i, j));
                disap[i][j] = 1;
            }
        }
    }

    int Q;
    cin >> Q;
    for(int i = 1; i <= Q; i++){
        //cout << "QUERY: " << i << "\n";
        int X, Y;
        cin >> X >> Y;
        removeToRemoves();
        updateMaxes(X+1, Y+1);
        // for(int i = 1; i <= N; i++){
        //     for(int j = 1; j <= M; j++){
        //         cout << C[i][j] << " ";
        //     }
        //     cout << "\n";
        // }
        // cout << "\n";
        // for(int i = 1; i <= N; i++){
        //     for(int j = 1; j <= M; j++){
        //         cout << deg[i][j].f << " ";
        //     }
        //     cout << "\n";
        // }
        // cout << "\n";
        // for(int i = 1; i <= N; i++){
        //     for(int j = 1; j <= M; j++){
        //         cout << deg[i][j].s << " ";
        //     }
        //     cout << "\n";
        // }
        // cout << "\n";
        if(C[X][Y] == 0 && maxrow[X+1] >= Y-1 && maxcol[Y+1] >= X-1){
            cout << 0 << "\n";
        }
        else{
            cout << 1 << "\n";
            if(C[X][Y] == 0){
                to_remove.push(mp(X, Y));
                disap[X][Y] = 1;
            }
            
        }
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 716 KB Output is correct
2 Correct 2 ms 972 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 4 ms 972 KB Output is correct
5 Correct 6 ms 972 KB Output is correct
6 Correct 6 ms 972 KB Output is correct
7 Correct 6 ms 1024 KB Output is correct
8 Correct 5 ms 972 KB Output is correct
9 Correct 5 ms 972 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 716 KB Output is correct
2 Correct 2 ms 972 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 4 ms 972 KB Output is correct
5 Correct 6 ms 972 KB Output is correct
6 Correct 6 ms 972 KB Output is correct
7 Correct 6 ms 1024 KB Output is correct
8 Correct 5 ms 972 KB Output is correct
9 Correct 5 ms 972 KB Output is correct
10 Correct 14 ms 972 KB Output is correct
11 Correct 4 ms 716 KB Output is correct
12 Correct 227 ms 10680 KB Output is correct
13 Correct 103 ms 9844 KB Output is correct
14 Correct 364 ms 11152 KB Output is correct
15 Correct 394 ms 11112 KB Output is correct
16 Correct 377 ms 11500 KB Output is correct
17 Correct 402 ms 11968 KB Output is correct
18 Correct 406 ms 11596 KB Output is correct
19 Correct 403 ms 12228 KB Output is correct
20 Correct 438 ms 12100 KB Output is correct
21 Correct 429 ms 12124 KB Output is correct